Refrigerator condenser coil assembly



Sept. 9, 1952 H. G. DICKMAN 2,610,039

REFRIGERATOR CONDENSER COIL ASSEMBLY Filed June 30, 1948 JNVENTOR.//4POA0 G D/cA MA/v fizhww 3 Sheets-Sheet l INVENTOR.

3 Sheets-Sheet 2 ATTO/P/VA'VS 7 /74/POA0 6 D/CK/VWA/ H G DICKMANREFRIGERATOR CONDENSER COIL ASSEMBLY Sept. 9, 1952 Filed June 30, 1948Sept. 9, 1952 H. G. DICKMAN 2,610,039

REFRIGERATOR CONDENSER COIL ASSEMBLY Filed June 30, 1948 3 Sheets-Sheet3 INVEN TOR. 614F040 v G fl/c/mm/v Patenteci Sept. 9, 1952 ASSEMBLYuamacrmckman, Pleasant Ridge. Mich. "npplicati'cn June s 0, 194's,seriar'uo: 36,253

is "invention r'lat'es' to eoiitleiisers primarily useful m coiinectibmwith mechanical re'frigera- 'li irstl the production of a new:

heat excha'ng l inexpensively; i Seconw t p'rtivide SUGh 'ai -GGHwhich-samba simply;'and easily assembled from mnedmetal shapes w-hic-hcanfbeproduced mos t inexpensively and whi'ch are particul'a rlyadapted*ifor assem- 'lal-yuin-t the coil :to lprovi'de a walllconstruction, extra radiation surfaces for dissipating 'h'eat ajnd astack arrangement and -flue action to assist in causing a circulation ofair through the coil.

Third, to provide suclva-coir-Which can be made up as a unit and applied-'toa standard mechanical refrigerator cabinet will an incon1- spicuousmannerand insucha way as to give highest emciencym operation.

Other objects and advantages will be apparent from the -fiillowing--descriptien otthe invention, which is shown-inthe accompanying drawings,in which FF ig. l zista perspective View-of a me 'riical ref fiigra torwith the-improved coil ins-talled thereon. i

-. Fig. :2 .isxca perspective viewi "the coil -as's'embly showing howthe tparts ;-are ;assembled.

Fig. 3 is a detailed partial sectional view taken on theli'ne 3, 3 ofFig. 2. I p f *Fig; 4- is -a--perspective"of the"assembly"itakenfi'omthe iipposite side of Fig.2;and

Fig. 5 is a perspective view of one of the sheet metal units employed inmaking up the assembly.

The condenser unit which comprises this invention is made up of a coil,which can be a continuous serpentine coil, having a series of straight,parallel legs, between which are disposed hollow, open-end sheet metalmembers which provide heat dissipating surfaces and which, when disposedvertically, serve as stacks or fiues which greatly increase theefliciency of the condenser by increasing the flow of the air past theheat transfer surfaces and thecoils. The hollow tubular sheet metalmembers are formed from sheet metal strips cut to length, preferably byrolling. They are preferably so formed that each has a flat side which,in combination with the other fiat sides, forms a continuous wallextending between the legs of the coil, thus providing an integralsurface which may assist in confining the air to give flue action andwhich can be exposed when the unit is mounted ona refrigeratorwithdimproved out disfiguring the same, thus eliminating-the necessity--1dr any 'cencealing walls. The sheet metal r'nembers- 1 preferablyslotted longitudii ally I to 'p'rovi'de' resiliericy which materiallyaids in assembling the iiriit -and in' maintaining 'the tube anaholldws'heet metal -meinb ers *in engagement during manufacturing "andthereafter. The side walls of the hollow members are cenf-ormed to thetube so afs tofit-therearound sc that" when they a1 bra'aed or sold-red'together=there-wi11 be adequate new-transfer from" I the tubes to 'thesheet metal members. In practica -the assembly meuzited witlr -the legs"of the tub'e' and =the she'e't metarm'ern ers erteriding vertically.These members -thus ffect i become stacks or 5 flues which a'ssist n hecirculation of the; aimand eliminate any He'dtiy curre'n'ts which mighttend to slow:ddwrnthe 'flow ot air past the coil. 1

i In: the drawings the unit is shcwn installedon a mechanical acme-cramI whicl-iistshown in a back perspective View, with' th'e coil asse'mblyfastened to the back wall 2 of the ca'bihea w hich isindica't'edgenerally at3. i

#:Ifhe condenser consists traseaes o'f straight, parallel legs; 5; whichare shown as-part or the serpentine ctube': d'iwhic'h here s'hown ascontinuous. i h Between ad j aoent; "iparallel legs 1 5 are insertedthe-.lopen-end ifsheet :-metal 1 "members 6. Ihese members-arevpreferably cut to the-length desired f 0121 anwgivemasseiribly. andtheniformed b;y -rolling. hEachi memberxhas a flat base 1 which, withthe. :fiat'sbases 11' et the Mother members, forms 1 a continuous wall 8extending between the legs 5 of the tube 4. Side walls 9 extend from thebase 1. Near the base 1 each side wall is formed with a half-round In tofit the legs 5 of the tube. The side wall then extends away from thebase as shown at H in Figs. 3 and 5, to a central longitudinal slot I2forming a substantially closed tube which is open at its ends and whichin the vertical position serves as a stack with the: walls serving asheat transfer surfaces.

The longitudinal slot provides resiliency in the sheet metal members sthat they can be easily assembled in the unit by sliding them betweenthe legs 5. How this is done is indicated in Fig. 2, the arrow showingthe direction in which the sheet metal members are pushed for assembly.

The assembled tubes and sheet metal members are joined by brazing orsoldering, as indicated at I3. A suitable supporting frame consists of aseries of metal straps M to which the flat bases I are attached as byspot welding, as indicated at I5. Bracket members It are provided foratand adjacent the legs, said Walls being shaped near the base to fitaround the adjacent leg and extending between the legs and beyond theplane thereof to form hollow flues parallel to said legs. the free edgesof said walls extending into proximity to one another but beingunconnected whereby said wall members may be flexed on insertion betweenlegs to conform to irregularities in said serpentine tube to establishand maintain contact between each of said wall and the adjav cent legthroughout the length of said wall withj out deforming said tube.

members 6 extend toward the wall of the cabinet.

' Y serpentine tube having a series of spaced straight They are thusprotected and concealed and are held in spaced relationship from therear wall of the cabinet providing an air space through which air cancirculate. The circulation is caused by convection and the air passingupwardly through the unit and the lines or stacks eliminates the.

heat from the condenser and efiiciently cools the unit.

The unit can be manufactured simply and inexpensively because of thenature of the sheet metal members 6 which canbe cut to length, thenformed by rolling and then assembled, making it possible to assembleanydesired size of unit depending upon the length oftube bent into theserpentine form.

The condenser is highly efficient in operation. It is possible to rununder very high back pressure and at very high temperatures with coolingto lower temperatures. p

The preferred form of the invention has been described above. It will beapparent to those skilled in the art that the condenser of thisinvention may be changed in form without departing from this invention.Although the preferred form has been described, there is no intention oflimiting the invention to this form, it being intended only that theinvention be limited to that covered by the claims.

Iclaim:

1. A condenser unit comprising a continuous serpentine tube having aseries of spaced straight parallellegs interconnected by bights in the.tube and having fitted between said legs and in contact therewith forsubstantially their entire length a. series of nonintegral sheet metalmembers each comprising a substantially fiat base, which, with the basesof adjacent members, forms a flat wall section joining said legs andeach memberhaving side walls extending fromthe sides of the baseandsubstantially perpendicular thereto 2. A condenser unit comprising acontinuous parallel legs interconnected by bights in the tube and havingfitted between said legs and in contact therewith for substantiallytheir entire length a series of nonintegral sheet metal members eachcomprising a substantially fiat base, which, with the bases of adjacentmembers. forms a flat wall section joining said legs and each memberhaving side walls extending from the sides of the base and substantiallyperpendicular thereto and adjacent the legs, said walls extendingbetween the legs and beyond the plane thereof to form hollow fluesparallel to said legs, the free edges of said walls extending intoproximity to one-another but being unconnected whereby said wall membersmay be flexed on insertion betweenlegs to conform to irregularities insaid serpentine tube to establish and maintain contact between each ofsaid walls and the adjacent. leg throughout the length of said wallwithout deforming said tube.

HAROLD G. DICKMAN,

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,961,070 Murphy May 29, 19342,071,182 Steenstrup Feb. 16, 1937- 2,090,417 Hull Aug. 17, 19372,123,366 Kehr et al. July 12, 1938 2,279,272 Anderson et al. Apr. 7,1942 2,430,774 Lynn Nov. 11, 1947 2,482,951 Vonk Sept. 27, 1949 FOREIGNPATENTS Number Country Date 403,899 Great Britain Jan. 4, 1934 55,406Sweden Apr. 2, 1921

